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[Doc] UX Icons doc tweaks
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‎src/Icons/doc/index.rst

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$ composer require symfony/ux-icons
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SVG Icons
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---------
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There are many icon sets available, each with their own unique style and set of
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icons, providing a wide range of icons for different purposes, while maintaining
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a consistent look and feel across your application.
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With more than 200,000 icons available, you can find the perfect icon for your
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project. Here are some of the most popular icon sets available:
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========================= ======= ========== =========== =================
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Icon Set Icons License Prefix Example
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========================= ======= ========== =========== =================
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`Bootstrap Icons`_ 2000 MIT bi bi:check
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`Boxicons`_ 1700 MIT bx bx:check
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`Flowbite`_ 1000 MIT flowbite flowbite:check
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`FontAwesome Icons`_ 7000 CC BY 4.0 fa6-regular fa6-regular:check
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`Heroicons`_ 300 MIT heroicons heroicons:check
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`Iconoir`_ 1500 MIT iconoir iconoir:check
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`Ionicons`_ 1300 MIT ion ion:check
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`Lucide Icons`_ 1500 MIT lucide lucide:check
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`Material Design Icons`_ 5000 Apache 2 mdi mdi:check
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`Octicons`_ 600 MIT octicon octicon:check
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`Phosphor Icons`_ 7000 MIT ph ph:check
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`Tabler Icons`_ 5200 MIT tabler tabler:check
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========================= ======= ========== =========== =================
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- `Bootstrap Icons <https://icons.getbootstrap.com/>`_
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- `Boxicons <https://boxicons.com/>`_
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- `Flowbite <https://github.com/themesberg/flowbite>`_
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- `FontAwesome Icons <https://github.com/FortAwesome/Font-Awesome>`_
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- `Heroicons <https://github.com/tailwindlabs/heroicons>`_
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- `Iconoir <https://github.com/iconoir-icons/iconoir>`_
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- `Ionicons <https://github.com/ionic-team/ionicons>`_
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- `Lucide Icons <https://github.com/lucide-icons/lucide>`_
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- `Material Design Icons <https://github.com/google/material-design-icons>`_
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- `Octicons <https://github.com/primer/octicons/>`_
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- `Phosphor Icons <https://github.com/phosphor-icons/homepage>`_
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- `Tabler Icons <https://github.com/tabler/tabler-icons>`_
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a consistent look and feel across your application. Here are some of the most
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popular icon sets available:
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======================== ======= ========== =============== =====================
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Icon Set Icons License Prefix Example
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======================== ======= ========== =============== =====================
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`Bootstrap Icons`_ 2000 MIT ``bi`` ``bi:check``
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`Boxicons`_ 1700 MIT ``bx`` ``bx:check``
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`Flowbite`_ 1000 MIT ``flowbite`` ``flowbite:check``
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`FontAwesome Icons`_ 7000 CC BY 4.0 ``fa6-regular`` ``fa6-regular:check``
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`Heroicons`_ 300 MIT ``heroicons`` ``heroicons:check``
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`Iconoir`_ 1500 MIT ``iconoir`` ``iconoir:check``
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`Ionicons`_ 1300 MIT ``ion`` ``ion:check``
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`Lucide Icons`_ 1500 MIT ``lucide`` ``lucide:check``
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`Material Design Icons`_ 5000 Apache 2 ``mdi`` ``mdi:check``
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`Octicons`_ 600 MIT ``octicon`` ``octicon:check``
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`Phosphor Icons`_ 7000 MIT ``ph`` ``ph:check``
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`Tabler Icons`_ 5200 MIT ``tabler`` ``tabler:check``
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======================== ======= ========== =============== =====================
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To see the full list of available icon sets, visit `ux.symfony.com/icons`_.
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│ └─ ...
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└─ ...
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Icons On-Demand
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~~~~~~~~~~~~~~~
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`ux.symfony.com/icons`_ has a huge searchable repository of icons from many
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different sets. This package provides a way to include any icon found on this
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site *on-demand*:
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1. Visit `ux.symfony.com/icons`_ and search for an icon
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you'd like to use. Once you find one you like, copy one of the code snippets provided.
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2. Paste the snippet into your Twig template and the icon will be automatically fetched (and cached).
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3. That's it!
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1. Visit `ux.symfony.com/icons`_ and search for an icon you'd like to use. Once
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you find one you like, copy one of the code snippets provided.
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``symfony/ux-twig-component`` is required to use the HTML syntax.
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HTML Attributes
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~~~~~~~~~~~~~~~
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The second argument of the ``ux_icon`` function is an array of attributes to add to the icon.
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.. code-block:: twig
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{# renders "user-profile.svg" with class="w-4 h-4" #}
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{{ ux_icon('user-profile', {class: 'w-4 h-4'}) }}
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{# renders "user-profile.svg" with class="w-4 h-4" and aria-hidden="true" #}
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{{ ux_icon('user-profile', {class: 'w-4 h-4', 'aria-hidden': true}) }}
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Default Attributes
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~~~~~~~~~~~~~~~~~~
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Accessibility
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-------------
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Icons are a used to add visual elements to your website, but they can be a challenge
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for accessibility.
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According to the `W3C <https://design-system.w3.org/styles/svg-icons.html>`_, there are
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three methods to improve icons accessibility, depending on the context:
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* **Decorative**: Icons that are purely decorative and do not convey any meaning or function.
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* **Informative**: Icons that convey information or a function.
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* **Functional**: Icons that are interactive and perform a function.
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Decorative Icons
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~~~~~~~~~~~~~~~~
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If the icon is purely decorative and does not convey any meaning or function, it should be
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hidden from screen readers using the ``aria-hidden`` attribute.
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.. code-block:: html+twig
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<a href="/profile">
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{{ ux_icon('user-profile', {class: 'w-4 h-4', 'aria-hidden': true}) }}
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Back to profile
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</a>
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Informative Icons
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~~~~~~~~~~~~~~~~~
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If the icon conveys information or a function, it should be given a text alternative that presents
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the same content or function, so that it can fulfill the same purpose.
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Icons add visual elements to your website and they can be a challenge for accessibility.
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According to the `W3C guide about SVG icon accessibility`_, there are
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three methods to improve icons accessibility, depending on the context.
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.. code-block:: twig
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Today's weather:
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{{ ux_icon('cloud-rain', {'aria-label': 'Rainy weather'}) }}
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**Decorative icons**
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They are purely decorative and do not convey any meaning or function. They
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should be hidden from screen readers using the ``aria-hidden`` attribute:
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Functional Icons
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~~~~~~~~~~~~~~~~
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.. code-block:: html+twig
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If the icon is interactive and performs a function, it should be given a text alternative that
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presents the same content or function, so that it can fulfill the same purpose.
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.. code-block:: twig
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<a href="/profile">
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{{ ux_icon('user-profile', {class: 'w-4 h-4', 'aria-hidden': true}) }}
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Back to profile
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</a>
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{{ ux_icon('user-profile', {class: 'w-4 h-4', 'aria-label': 'User Profile'}) }}
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**Informative icons**
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They convey information or a function. They should define a text alternative
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that presents the same content or function via the ``aria-label`` attribute
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used by screen readers and other assistive technologies:
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.. note::
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.. code-block:: twig
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The ``aria-label`` attribute is used to provide a label for the icon. It is read by
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screen readers and other assistive technologies.
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Today's weather:
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{{ ux_icon('cloud-rain', {'aria-label': 'Rainy weather'}) }}
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.. note::
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**Functional icons**
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They are interactive and perform a function. They should define a text alternative
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that presents the same content or function via the ``aria-label`` attribute
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used by screen readers and other assistive technologies:
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The ``aria-hidden`` attribute is used to hide the icon from screen readers and other
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assistive technologies.
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.. code-block:: twig
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{{ ux_icon('user-profile', {class: 'w-4 h-4', 'aria-label': 'User Profile'}) }}
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Performance
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-----------
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many _on-demand_ icons. You can think of importing the icon as *locking it* (similar to how
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``composer.lock`` _locks_ your dependencies).
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Icon Caching
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~~~~~~~~~~~~
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TwigComponent
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~~~~~~~~~~~~~
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The ``ux_icon`` function is optimized to be as fast as possible. To deliver the same level
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of performance with the TwigComponent (``<twig:UX:Icon name="..." />``), the TwigComponent
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usual overhead is reduced to the bare minimum, immediately calling the IconRenderer and
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The ``ux_icon()`` function is optimized to be as fast as possible. To deliver the
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same level of performance when using the HTML syntax (``<twig:UX:Icon name="..." />``),
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the TwigComponent overhead is reduced by calling the IconRenderer immediately and
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returning the HTML output.
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.. warning::
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<path fill="currentColor" d="M21 7L9 19l-5.5-5.5l1.41-1.41L9 16.17L19.59 5.59z"/>
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</svg>
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Configuration
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-------------
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ux_icons:
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{# ... #}
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Debugging Configuration
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~~~~~~~~~~~~~~~~~~~~~~~
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.. _`ux.symfony.com/icons`: https://ux.symfony.com/icons
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.. _`Iconify`: https://iconify.design
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.. _`symfony/asset-mapper`: https://symfony.com/doc/current/frontend/asset_mapper.html
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.. _`W3C guide about SVG icon accessibility`: https://design-system.w3.org/styles/svg-icons.html#svg-accessibility
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.. _`Bootstrap Icons`: https://icons.getbootstrap.com/
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.. _`Boxicons`: https://boxicons.com/
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.. _`Flowbite`: https://github.com/themesberg/flowbite
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.. _`FontAwesome Icons`: https://github.com/FortAwesome/Font-Awesome
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.. _`Heroicons`: https://github.com/tailwindlabs/heroicons
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.. _`Iconoir`: https://github.com/iconoir-icons/iconoir
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.. _`Ionicons`: https://github.com/ionic-team/ionicons
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.. _`Lucide Icons`: https://github.com/lucide-icons/lucide
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.. _`Material Design Icons`: https://github.com/google/material-design-icons
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.. _`Octicons`: https://github.com/primer/octicons/
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.. _`Phosphor Icons`: https://github.com/phosphor-icons/homepage
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.. _`Tabler Icons`: https://github.com/tabler/tabler-icons

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